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Method for producing aromatic hydrocarbon by low-olefin light hydrocarbon

A technology with low olefin content, applied in chemical instruments and methods, hydrocarbons, hydrocarbons, etc., can solve the problem of low applicability of light hydrocarbon raw materials, achieve long single-pass operation cycle, prolong service life, and apply to the range of raw materials wide effect

Active Publication Date: 2010-06-30
SHANDONG DAQI PETROLEUM CHEM DESIGN
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Problems solved by technology

Therefore, the current research and design of the aromatization process is mainly aimed at carbon dioxide with a relatively high olefin content and an overall exothermic reaction. 3 -C 5 In particular, petroleum liquefied gas from a wide range of sources is not very suitable for light hydrocarbon feedstocks with low olefin content and generally endothermic reactions

Method used

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  • Method for producing aromatic hydrocarbon by low-olefin light hydrocarbon

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Embodiment

[0021] The production process adopts the Nano-forming process, specifically: the condensate oil pretreated by impurities is gasified by the feed evaporator and then enters the composite heating furnace to heat up to 450-570 ° C, and then enters the fixed-bed double reactor from top to bottom , Carry out aromatization reaction under the action of DLP type catalyst, reaction temperature 500℃-600℃, pressure 0-0.4MPa, space velocity 0.4-0.8h -1 . Most of the raw materials are converted into aromatic components such as benzene, toluene, and xylene, and at the same time, olefin-rich dry gases such as hydrogen, methane, ethylene, propane, and propylene are generated. The raw material composition and reaction effect are shown in Table 1.

[0022] Table 1 Main performance indicators of nano ZSM-5 type aromatization catalyst (DLP) for light hydrocarbons with low olefin content

[0023]

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Abstract

The invention provides a method for producing aromatic hydrocarbon by low-olefin light hydrocarbon, relating to the technical field of light hydrocarbon aromatization. The invention is characterized by comprising the following steps: after impurity pretreatment and subsequent gasification by an feed evaporator, the low-olefin light hydrocarbon enters a complex heater with the temperature heating up to 450-570 DEG C, and then enters a fixed bed double reactor system from top to bottom and undergoes aromatization reaction under the action of catalyst, with the reaction temperature of 500 DEG C-600 DEG C, the pressure of 0.1-0.4MPa, and the space velocity of 0.4-0.8h<-1>. The invention has the advantages of small process investment, simple process and long service life of the catalyst.

Description

technical field [0001] The invention belongs to the technical field of aromatization of light hydrocarbons, and in particular relates to a method for producing aromatics by utilizing light hydrocarbons with low olefin content. Background technique [0002] At present, some foreign light hydrocarbon aromatization technologies have entered the stage of industrial application. Domestic research on the aromatization of light hydrocarbons has also made some progress. For example, the Research Institute of Petroleum Science (RIPP) investigated the aromatization reaction of propane on ZRP molecular sieves and silicon-modified ZRP molecular sieves. On the ZRP molecular sieve, the xylene isomers in the liquid product are basically in a thermodynamic equilibrium distribution, and the para-selectivity is poor; on the silicon-modified ZRP molecular sieve, with SiO 2 With the increase of the content, the coverage degree of the active center on the outer surface of the ZRP molecular siev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/42C07C15/02
Inventor 宋金富
Owner SHANDONG DAQI PETROLEUM CHEM DESIGN
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